1、Designation: A 203/A 203M 97(Reapproved 2003)Standard Specification forPressure Vessel Plates, Alloy Steel, Nickel1This standard is issued under the fixed designation A 203/A 203M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, th
2、e year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification2covers
3、nickel-alloy steel plates in-tended primarily for welded pressure vessels.1.2 Plates under this specification are available with fourstrength levels and two nickel compositions as follows:Nominal Yield TensileNickel Strength, Strength,Content min, ksi min, ksiGrade % MPa MPaA 2.25 37 255 65 450B 2.2
4、5 40 275 70 485D 3.50 37 255 65 450E 3.50 40 275 70 485F 3.502 in. 50 mm and under 55 380 80 550Over 2 in. 50 mm 50 345 75 5151.3 The maximum thickness of plates is limited only by thecapacity of the composition to meet the specified mechanicalproperty requirements. However, current practice normall
5、ylimits the maximum thickness of plates furnished under thisspecification as follows:GradeMaximum Thickness,in. mmA 6 150B 6 150D 4 100E 4 100F 4 1001.4 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in bracke
6、ts. The values stated in eachsystem are not exact equivalents. Therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with this specifi-cation.2. Referenced Documents2.1 ASTM Standards:A 20/A 20M Specification for General Requ
7、irements forSteel Plates for Pressure Vessels3A 435/A 435M Specification for Straight-Beam UltrasonicExamination of Steel Plates3A 577/A 577M Specification for Ultrasonic Angle-BeamExamination of Steel Plates3A 578/A 578M Specification for Straight-Beam UltrasonicExamination of Plain and Clad Steel
8、Plates for SpecialApplications33. General Requirements and Ordering Information3.1 Material supplied to this material specification shallconform to Specification A 20/A 20M. These requirementsoutline the testing and retesting methods and procedures,permissible variations in dimensions and mass, qual
9、ity andrepair of imperfections, marking, loading, etc.3.2 Specification A 20/A 20M also establishes the rules forthe basis of purchase that should be complied with whenpurchasing material to this specification.3.3 In addition to the basic requirements of this specifica-tion, certain supplementary re
10、quirements are available whenadditional control, testing, or examination is required to meetend use requirements. These include:3.3.1 Vacuum treatment,3.3.2 Additional or special tension testing,3.3.3 Impact testing, and3.3.4 Nondestructive examination.3.4 The purchaser is referred to the listed sup
11、plementaryrequirements in this specification and to the detailed require-ments in Specification A 20/A 20M.3.5 If the requirements of this specification are in conflictwith the requirements of Specification A 20/A 20M, the re-quirements of this specification shall prevail.4. Materials and Manufactur
12、e4.1 Steelmaking PracticeThe steel shall be killed andshall conform to the fine grain size requirement of Specifica-tion A 20/A 20M.5. Heat Treatment5.1 All plates shall be thermally treated as follows:1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and R
13、elated Alloys and is the direct responsibility of SubcommitteeA01.11 on Steel Plates for Boilers and Pressure Vessels.Current edition approved Sept. 10, 2003. Published October 2003. Originallyapproved in 1937. Last previous edition approved in 1997 as A 203/A 203M 97.2For ASME Boiler and Pressure V
14、essel Code applications, see related Specifi-cation SA-203/SA-203M in Section II of that Code.3Annual Book of ASTM Standards, Vol 01.04.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.1 All plates of Grades A, B, D, and E shall b
15、e normal-ized except as permitted by 5.1.1.1.5.1.1.1 If approved by the purchaser for GradesA, B, D, andE, cooling rates faster than air cooling are permissible forimprovement of the toughness, provided the plates are subse-quently tempered at not less than 1100F 595C for not lessthan12 h.5.1.2 All
16、plates of Grade F shall be heat treated by heatinginto the austenitic range, quenching in water, and tempering atnot less than 1100F 595C for not less than12 h.6. Chemical Composition Chemical Composition6.1 The steel shall conform to the chemical requirementsshown in Table 1 unless otherwise modifi
17、ed in accordance withSupplementary Requirement S17, Vacuum Carbon-DeoxidizedSteel, in Specification A 20/A 20M.7. Mechanical Properties7.1 Tension Test RequirementsThe material as representedby the tension test specimens shall conform to the requirementsshown in Table 2.7.1.1 For plates that have be
18、en heat treated in accordancewith 5.1.1.1 or 5.1.2 and have a nominal thickness of34 in. 20mm and under, the 112-in. (40-mm) wide rectangular speci-men may be used for the tension test, and the elongation maybe determined in a 2-in. 50-mm gage length that includes thefracture and that shows the grea
19、test elongation. When thisspecimen is used, the elongation shall be not less than 23 %.7.2 Impact Test Requirements:7.2.1 Plates of Grades A, B, D, and E that have been heattreated in accordance with 5.1.1.1 shall be Charpy V-notchimpact tested. The impact test shall meet 20 ft lbf 27 J. Thetest tem
20、perature and orientation shall be a matter of agreementbetween the purchaser and supplier.7.2.2 Grade F plates shall be impact tested in accordancewith Supplementary Requirement S5 in Specification A 20/A 20M.TABLE 1 Chemical RequirementsElementsComposition, %Grade A Grade B Grade D Grades E and FCa
21、rbon, maxA:Up to 2 in. 50 mm in thickness 0.17 0.21 0.17 0.20Over 2 in. to 4 in. 100 mm incl. in thickness 0.20 0.24 0.20 0.23Over 4 in. 100 mm in thickness 0.23 0.25 . .Manganese, max:Heat analysis:2 in. 50 mm and under 0.70 0.70 0.70 0.70Over 2 in. 50 mm 0.80 0.80 0.80 0.80Product analysis:2 in. 5
22、0 mm and under 0.78 0.78 0.78 0.78Over 2 in. 50 mm 0.88 0.88 0.88 0.88Phosphorus, maxA0.035 0.035 0.035 0.035Sulfur, maxASilicon:0.035 0.035 0.035 0.035Heat analysisProduct analysis0.150.400.130.450.150.400.130.450.150.400.130.450.150.400.130.45Nickel:Heat analysisProduct analysis2.102.502.032.572.1
23、02.502.032.573.253.753.183.823.253.753.183.82AApplies to both heat and product analyses.TABLE 2 Tensile RequirementsGrades A and D Grades B and E Grade Fksi MPa ksi MPa ksi MPaTensile strength2 in. 50 mm and underOver 2 in. 50 mm6585658545058545058570907090485620485620801007595550690515655Yield stre
24、ngth, min2 in. 50 mm and underOver 2 in. 50 mm373725525540402752755550380345Elongation in 8 in. 200 mm min, %A19 17 .Elongation in 2 in. 50 mm min, %A,B23 21 20ASee Specification A 20/A 20M for elongation adjustments.BSee 7.1.1.A 203/A 203M 97 (2003)28. Keywords8.1 alloy steel plate; nickel alloy st
25、eel; pressure containingparts; pressure vessel steels; steel plates; steel plates forpressure vessel applicationsSUPPLEMENTARY REQUIREMENTSSupplementary requirements shall not apply unless specified in the order.Alist of standardized supplementary requirements for use at the option of the purchaser
26、are includedin Specification A 20/A 20M. Those which are considered suitable for use with this specification arelisted below by title.S1. Vacuum Treatment,S2. Product Analysis,S3. Simulated Post-Weld Heat Treatment of MechanicalTest Coupons,S4.1 Additional Tension Test,S5. Charpy V-Notch Impact Test
27、,S6. Drop Weight Test (for Material 0.625 in. 16 mm andover in Thickness),S7. High-Temperature Tension Test,S8. Ultrasonic Examination in accordance with Specifica-tion A 435/A 435M,S9. Magnetic Particle Examination,S11. Ultrasonic Examination in accordance with Specifica-tion A 577/A 577M,S12. Ultr
28、asonic Examination in accordance with Specifica-tion A 578/A 578M,S14. Bend Test, andS17. Vacuum Carbon-Deoxidized Steel.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expres
29、sly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,
30、 either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may at
31、tend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 203/A 203M 97 (2003)3
